This is easy to say, but it is certainly not impossible. If your embedded technology is good, it is not a problem for this system. Mainly focus on a few points, personal suggestions:

1, database selection: mysql can be used;

2, database table design: it is not recommended to engage in foreign key association or something, and it will be more troublesome to query at that time;

3, program framework: you don't need to use ssh, just use the part inside;

4、 ........

You can find some small examples on the internet, and have a look first.

6. It involves inventory, lending, return, addition and subtraction, etc.

If the whole project takes 30 days, it is suggested to spend 8 days thinking about design, architecture, preliminary work, and post-development is to write code. Don't write unplanned handwritten code, and finally you have to turn over your homework.

Good luck, friend.